热电偶的劣化及对策

The Wastage of Thermocouple and Prevent Countermeasures

热电偶的劣化是不可避免的,将随热电偶的种类、直径、使用温度、时间、气氛等不同而各异。对其定量很困难。只能针对影响热电偶劣化的因素提供对策,达到减缓劣化进程,延长热电偶使用寿命的目的。详细阐述贵金属及廉金属热电偶的劣化与使用寿命的影响因素,着重探讨钨铼热电偶及渗碳炉用热电偶的劣化及对策。

The wastage of thermocouple is inescapable.Its different results of wastage depends on its kinds 、diameter and operating temperature、service time 、atmosphere,however,quantitative analysis to these results is difficult.The only thing is to find out good countermeasures according to influence factors.The influence factors of wastage and service life of thermocouple of noble metals and cheap metals are narrated detailedly.The wastage and countermeasures of tungsten rhenium thermocouples and thermocouples used in infiltrating carbon furnace are discussed emphatically.